public Task <DeregisterTargetsResponse> DeregisterTargetAsync( TargetGroup targetGroup, Amazon.EC2.Model.Instance instance, CancellationToken cancellationToken = default(CancellationToken)) => _clientV2.DeregisterTargetsAsync( new DeregisterTargetsRequest() { TargetGroupArn = targetGroup.TargetGroupArn, Targets = new List <TargetDescription>() { new TargetDescription() { Id = instance.InstanceId } } }, cancellationToken: cancellationToken).EnsureSuccessAsync();